<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>继承</title>
    <style type="text/css">
        body{
           color: red; 
           font-size: 20px;
           width: 100px;
        }
        p{
            color: blue;
        }
        span{
            color: green;
        }
        .t1{
            color: yellow !important;
        }
        #t11{
            color: red;
        }
    </style>
</head>
<body>
    <p>
        <span style="color: green" id="t1" class="t1">学并思</span>
    </p>
</body>
</html>